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-rw-r--r--linux-headers/linux/vhost.h7
1 files changed, 7 insertions, 0 deletions
diff --git a/linux-headers/linux/vhost.h b/linux-headers/linux/vhost.h
index 649560c685..bea6973906 100644
--- a/linux-headers/linux/vhost.h
+++ b/linux-headers/linux/vhost.h
@@ -227,4 +227,11 @@
  */
 #define VHOST_VDPA_GET_VRING_DESC_GROUP	_IOWR(VHOST_VIRTIO, 0x7F,	\
 					      struct vhost_vring_state)
+
+/* Get the queue size of a specific virtqueue.
+ * userspace set the vring index in vhost_vring_state.index
+ * kernel set the queue size in vhost_vring_state.num
+ */
+#define VHOST_VDPA_GET_VRING_SIZE	_IOWR(VHOST_VIRTIO, 0x80,	\
+					      struct vhost_vring_state)
 #endif